Conveyer for a continuous normalizing furnace



Nov. 5, 1929. 5. J. LESKAWA CONVEYER FOR A CONTINUOUS NOR MALIZING FURNACE Original Filed Jan. 4, 1927 5 Sheets-Sheet Nov. 5, 1929. 5. J. LESKAWA 1,734,814

CONVEYER FOR A CONTINUOUS NORMALIZING FURNACE Original Fild Jan. 4, 1927 5 Sheets-Sheet 2 Nov. 5, 1929. 5. J. LESKAWA CONVEYER FO'n A CONTINUOUS NORMALIZING FURNACE Original Filed Jan. 4, 1927 s Sheets-Sheet Inven 20 7,-

Patented Nov. 5, 1929 warren stares PATENTOFHCEI SIGMUND JULIAN LESKAWA, OE YOUNGSTOWN, OHIO GONVEYER non A conrmuoosnonivmnrzrno '11Unnnon.

Application filed January 4, 1927, Serial No. 158,998. Renewed September 23, 1929.

The invention relates to the method of conveying steel sheets which are subject to a heat from 1700 degrees to 2000 degrees Fahrenheit so as to anneal and normalize a steel sheet and give it good drawing qualities, or in other words subjecting it to surface strains without injuring 0r impairing the surface of the sheet. The conveyer is designed with the idea in mind that when the sheet leaves the furnace after its heat treatment its surface will not be marred in any way by the process of conveying it through the different zones of heat it has to undergo. The conveyer is designed for furnaces fired with fuel oil, producer gas or by electricity, and can be used on furnaces fired overhead or underfired.

Fig. 1 is a section the furnace.

Fig. 2 is a side View of the detachable link chain supports.

Fig. 3 is a sectional view of the furnace showing the position of the carriers and conveyer chains.

25 Fig. 1 is a schematic showing of one end of the furnace conveyer.

Fig. 1 shows a section through the side wall of a continuous normalizing furnace with an upper casting 1 which carries the weight of the roof and the upper part of the furnace. This casting is bolted at both ends to an H- beam constructed buckstay 2. These buckstays 2 are set on equal centers and there are 10 buckstays 2 on each side of the furnace. 35 Lower casting 3 is bolted to buckstay 2 at both ends of casting 3. Lower casting?) supports channel 4:, which is bolted at its flange to buckstay 2. This channel has a wearing plate 5 screwed to it upon which rides a roller through a side wall of between two side bars 7 and two angle shaped bars 8. A plate 9 and angle 10 are bolted to angle 8 Fig. 1 and Fig. 2. Attachment 11 is bolted to angle 10. Attachment 11 has an upper roller 12 fastened to it with washer 13 and cotter key 14 to retain it. At its lower end is roller 15 with a washer and cotter key to retain it. Through the center of attach ment 11 and angle 10 passes an adjuster 15 which slides ina retainer 16 which is bolted chain 6 which consists of a cast iron roller 6 V I apart Fig. 2 and belng high temperature to angle shaped bar 8 and plate 9. To adj uster 15 is bolted a detachable link chain attachment 17 for a detachable chain 18. The detachable link chain attachment 17 is made of a high temperature alloy. Detachable; chain 18 consists of a plurality of links which run across to the other side of the furnace and attach to a similar attachment 17 there Fig. 3. Nut 19 screws onto the threaded portion of the adjuster 15 and draws up the high temperature alloy detachable chain 18 making it taut. The strain on the chain 18 is transmitted to rollers 12 and 15. Roller 12 rolls on the wearing plate 19 which. is screwed to channel 20. Channel 20 is bolted at its flange to buckstay 2. The lower roller 15 rolls on the wearing plate 21 which is bolted to angle 22. Angles 23 and 24 are placed as guides for rollers 12 and 15 in case the detachable link chain 18 should happen: to become too loose. rides between two angles 26 which are bolted to a channel 27 Figure 1 and Fig. 2 and the angle shaped bars 8. The purpose of the upper roller 25 is to support the main drive;

The upper roller'25 I chain 6 on its return under the furnace as 1 shown in Fig. 3. The high temperature alloy T irons 27 Fig. 3 and Fig. 4 set on the detachable chain 18 and are held in place by high tem-, perature alloy bolts which fasten to the high-g; temperature alloy angles 28 which set in the recess on the under side of the high tempera-- ture alloy chain 18 as shown in Fig. 3 and ,Fig. 4. The steel sheet 29 which undergoes the heat treatment lies onthe high tempera-;. ture alloy T irons 27 and is carried through the furnace on them and is then deposited on another conveyer 30 Fig. 4 which conveys it to a cooling table and then stacked.

. The cross chains 18 are equal distances alloy detachable chains are able to withstand the high temperature they have to undergo, also they are flexible enough that in case, they sag they can be drawn up to a horizontal po-: sition. Any expansion in the detachable link chain 18 can be taken up by the adjuster 15 and the conveyer is so designed that the adjusters 15 on both sides of the furnace are able to. take up a maximum distance of 6" Which Will never be required for if the cross chain 18 should happen to expand over 3 in its entire length a link can be removed and the takeups 15 adjusted so as to draw the cross chain 18 up taut.

:I claim:

In combination with a furnace having sidewalls; guideways in each sidewall comprising spaced converging brackets forming a continuous slot on each side of the jfurnace, endless roller chains traveling in the guideways, carriers connected to the chains," a plural ty of load supports mounted on each carrier, and means for adjusting the length oi the carriers to eliminate sag.

SIGMUND JULIAN. LESKAWA. 

